Improvement in wood-turning lathes



UNITED STATES PATENT OEEIcE.

ALBERT P. C. BON'IE, OF CINCINNATI, OHIO.

yIMPROVEMENT IN WOOD-TURNING LATHES.

Specication forming part of Letters `Patent No. 78,919, dated June 16,1,868.

To all whom it may concern:

Beit known that I, ALBERT P. C. BONTE, of Cincinnati, `Hamilton county,Ohio, have invented a new and useful Lathe for Turning Elliptical Forms;and I hereby vdeclare the following to be a full, clear, and exactdescription thereof, reference being had'to the accompanying drawings,making part of this specification.

My invention relates to that class of lathes employed for turningelliptical forms, and consists in the provision of a counterpoise toprevent the sway or lurchin g motion to which such lathes are subject.

Figure l is a perspective view of a lathe embodying my invention. Fig. 2is a top view of the same Without the face-plates, and having one oi theeccentrics represented in section. Fig. 3 is a rear perspective view ofa face-plate detached.

The base A and the heads or standards B B of the head-stock I prefer toforni of one casting, in order to insure stability; and still further toinsure this condition, the casting may be continued in the forni of abox or shell on either or both sides, as far as consistent with thetraverse of the belt,

C C are the head and tail journal boxes or bearings of the spindle D.

E and F represent, respectively, the adjustable eccentric and theface-place which forni thicustom ary oval-turning or elliptical chuck,and G is a customary belt-pulley.

The tail end of the lathe is provided with a` supplementary eccentric,H, adjustable in the opposite direction to the eccentric E, and, likeit, having slots h and screws 71. or equivalent devices, to enable vitto be shifted and secured to any specific adjustment.

I is a supplementary face-plate, designed to counterbalance theface-plate F, and thus to neutralize the swaying motion customarilyincident thereto.

The face-plate I, like the faceplate F, is provided with gibs f,preferably of hard wood, the end of Whose grain is presented toward theperipheryof the eccentric, and said gibs are adj usted toward and `fromsaid periphery by means of set screws f', tapped within flanges f",ca-st in one piece with and projecting rearwardly from the guide-bar Lupon the back of the face-plate.

It is found in practice that the weight of the above-describedsupplementary face-plate should be about half thatof the face-plateproper.

Each face -plate has an interiorly screwthreaded hub or nut, K, of whichthat belonging to theiface-plate proper engages on a righthand screw, d,on the front end of the spindle, vwhile that of the supplementaryface-plate eugages on asimilar but left-hand screw, d', on the tail endoi' said spindle.

The guide-bar L, with its attached face-plate, slides in the hub K, asthe latter is rotated, in the usual manner with oval-turning lathes.

While preferring the herein-selected illustration of my invention, Ireserve the right to 'vary the saine. For example, the counterpoise maybe located immediately in rear of the head or standard B, or at anyother point on the shaft D.`

I claim herein as new and of myinvention- The adjustable counterpoise HI, constructed substantially as described, and arranged relatively tothe chuck E F of an eccentric or elliptical turning-lathe, to operate`in the manner and for the purpose specified.

In testimony of which invent-ion I hereunto set my hand.

ALBERTI P. C. BONTE.

Witnesses GEO. H. KNIGHT, J AMEs H. .LAN/LAN.

